Download understanding communicable disease powerpoint

Understanding Communicable
Diseases
In this chapter, you will Learn About…
 Types of germs that can cause diseases.
 The function of the immune system.
 Some common communicable diseases.
 Diseases that are transmitted by sexual
contact.
 Preventing the spread of communicable
diseases.
Causes of Communicable Diseases
In this lesson, you will Learn About…
 Types of germs that can cause disease.
 What an infection is.
 How germs are spread.
Causes of Communicable Diseases
The Vocabulary terms in this lesson are:
 Disease.
 Viruses.
 Communicable disease.
 Bacteria.
 Germs.
 Fungi.
 Pathogens.
 Protozoa.
 Infection.
Germs and Diseases
A disease is any condition that interferes
with the proper functioning of the body or
mind.
A communicable disease is a disease that
can be spread to a person from another
person, an animal, or an object.
All communicable diseases are caused by
germs.
Germs and Diseases (cont’d.)
The germs that are responsible for causing
disease are known as pathogens.
An infection is a condition that occurs
when pathogens enter the body, multiply,
and damage body cells.
If the body is not able to fight off the
infection, a disease develops.
Types of Pathogens
Types of pathogens include the following:
 Viruses – The smallest and simplest diseasecausing organisms
 Bacteria – Tiny one-celled organisms that live
nearly everywhere
 Fungi – Primitive life-forms, such as molds or
yeasts, that cannot make their own food
 Protozoa – One-celled organisms that have a
more complex structure than bacteria
Pathogens and the Diseases They
Cause
Pathogens
Viruses
Bacteria
Diseases
AIDS, chicken pox, colds, hepatitis,
herpes, influenza, measles,
mononucleosis, mumps, polio, rabies,
smallpox, viral pneumonia.
Bacterial pneumonia, diphtheria,
most foodborne, illness, gonorrhea,
Lyme disease, pinkeye, strep throat,
tuberculosis.
Athletes foot, ringworm.
Fungi
Amebic dysentery, malaria.
Protozoa
How Pathogens Are Spread
Pathogens can be spread in several ways:






Direct contact with others
Indirect contact, such as sneezing
Contact with animals or insects
Contaminated food and water
Contact with someone’s blood
Sexual contact
Reviewing Terms and Facts
1. Define the terms disease and
communicable disease.
A disease is any condition that interferes with
the proper functioning of the body or mind. A
communicable disease is a disease that can be
spread to a person from another person, an
animal, or an object.
Reviewing Terms and Facts
2. What are six ways in which pathogens
spread?
1. Direct contact with others
2. Indirect contact
3. Contact with animals or insects
4. Contaminated food and water
5. Contact with someone else’s blood
6. Sexual contact
Thinking Critically
3. Is it more difficult to protect yourself
from pathogens that are spread through
direct contact or indirect contact?
Explain your answer.
Vocabulary Review
A disease is any condition that interferes
with the proper functioning of the body or
mind.
Vocabulary Review
A communicable disease is a disease that
can be spread to a person from another
person, an animal, or an object.
Vocabulary Review
Germs are organisms that are so small that
they can be seen only through a
microscope.
Vocabulary Review
Pathogens are the germs that are
responsible for causing disease.
Vocabulary Review
An infection is a condition that occurs
when pathogens enter the body, multiply,
and damage body cells.
Vocabulary Review
Viruses are the smallest and simplest
disease-causing organisms.
Vocabulary Review
Bacteria are tiny one-celled organisms that
live nearly everywhere.
Vocabulary Review
Fungi are primitive life-forms, such as
molds or yeasts, that cannot make their
own food.
Vocabulary Review
Protozoa are one-celled organisms that
have a more complex structure than
bacteria.
Fold the sheet of paper
along the long axis,
leaving a ½” tab along the
side.
Turn the paper. Fold in
half, then fold in half
again.
Unfold and cut the top
layer along the three
fold lines. This makes
four tabs.
Label the tabs as
shown.
Under the appropriate tab, summarize what you
learn about each type of pathogen.
Rate your understanding of how to prevent
communicable diseases by taking the Health
Inventory for Chapter 12 at
http://www.glencoe.com/qe/qe65.php?qi=1505